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    GreyFlow™

    WCTNZ® is proud to be the official distributor of GreyFlow™ composting toilets in the Realm of New Zealand (New Zealand, the Cook Islands, Niue, Tokelau and the Ross Dependency)

     

    GREYFLOW™ World Leading Greywater Diversion Technology. Reduces water bills, uses fewer water resources, irrigates your garden during water restrictions, and decreases demand on energy for sewage transport.

    GreyFlow™ sets the standard in greywater diversion. Reuse shower and laundry water via compliant GreyFlow™ systems so you save water, keep gardens thriving through water restriction periods, and reduce network/onsite system load.

    The GreyFlow™ GWDD range is WaterMark™ certified and award-winning (2018 Australian Water Association).

     

    Cut mains water use & bills

    Keep gardens alive in restrictions

    Lower load on sewers/onsite systems

    Reliable, low-maintenance filtration & pumping

    ✓ WaterMark™ Certified

     

    Say yes to greywater done right

     

    Notes: Greywater systems are a great way to save water. In New Zealand, the compliant method is subsurface land application (below ground)—not surface/sprinkler irrigation—so you can reuse greywater safely and within council rules.


    WCTNZ® | Waterless Composting Toilets NZ Limited | Copyright 2025 ©

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    GreyFlow™ 6 Way Rotor Valve

    GW GFRT 6
    The GreyFlow™ Rotor 6 station hydraulic indexing valve is a great add-on to your GreyFlow™ greywater irrigation system.
    $278.26 excl GST

    GreyFlow™ Flush Valve Kit (X2 Valves)

    GW GF-FVx2
    The GreyFlow™ flush valve is an end-of-line flushing value add-on to your GreyFlow™ greywater irrigation system.
    $130.43 excl GST

    GreyFlow™ | PS-AG | Complete Range of Above Ground (AG) Greywater Diversion Systems

    GW GFPS-AG-###
    GreyFlow™ | PS-AG | Complete Range of Above Ground (AG) Greywater Diversion Systems
    Lowest-tier pricing $1,699.95 excl GST

    GreyFlow™ PRO | 2-Stage | Below Ground (Whole-of-House System)

    GW GF-PRO
    The range of GreyFlow™ PRO 2-Stage installation system greywater diversion systems is suitable for the new build, where the plumber needs to prefix the tank (access pit) and the finishing kit later on.
    Lowest-tier pricing $1,057.51 excl GST

    GreyFlow™ | Feeder Pipe - Flow Restrictor

    GW GF-CV25
    Flow restrictor for use on downhill runs where the slope (gradient) exceeds 3°.
    $49.26 excl GST

    GreyFlow™ | Feeder Pipe - Flow Restrictor 6X Kit

    GW GF-CV25-6xKit
    Flow restrictors for use on downhill runs where the slope (gradient) exceeds 3°.
    $270.00 excl GST